NZS 1170.5:2004 (Includes Amdt 1)
Structural design actions - Part 5: Earthquake actions - New Zealand
Provides procedures for the determination of earthquake actions on structures in New Zealand. It gives the requirements for verification procedures, site hazard determination, the evaluation of structural characteristics, structural analysis for earthquake action effects, the determination and limits for deformations and the seismic design of parts of structures. It is to be applied in conjunction with AS/NZS 1170 parts 0, 1, 2 and 3. Appendices cover aspects of ultimate limit state design and the requirements for material specific structural design standards that are able to be used in conjunction with NZS 1170.5. This standard is used by structural engineers to assess and calculate the forces and deformations from earthquakes acting on structures such as buildings and other structures. It helps engineers design structures that comply with the New Zealand Building Code’s earthquake resistance requirements.
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NZS 1170.5:2004 STRUCTURAL DESIGN ACTIONS – EARTHQUAKE ACTIONS – NEW ZEALAND
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 DETERMINATION OF EARTHQUAKE ACTIONS
1.3 LIMIT STATES
1.4 SPECIAL STUDIES
1.5 REFERENCED DOCUMENTS
1.6 UNITS
1.7 DEFINITIONS
1.8 NOTATION
SECTION 2 VERIFICATION
2.1 GENERAL REQUIREMENTS
2.2 STRUCTURAL TYPES
2.3 ULTIMATE LIMIT STATE VERIFICATION
2.4 SERVICEABILITY LIMIT STATE VERIFICATION
2.5 DEFORMATION CONTROL
2.6 STRUCTURE PARTS
2.7 DEFORMATION DEMANDS ON STRUCTURAL MEMBERS NOT DESIGNED TO RESIST SEISMIC ACTIONS
SECTION 3 SITE HAZARD SPECTRA
3.1 ELASTIC SITE SPECTRA FOR HORIZONTAL LOADING
3.2 SITE HAZARD SPECTRA FOR VERTICAL LOADING
SECTION 4 STRUCTURAL CHARACTERISTICS
4.1 PERIOD OF VIBRATION
4.2 SEISMIC WEIGHT AND SEISMIC MASS
4.3 STRUCTURAL DUCTILITY FACTOR
4.4 STRUCTURAL PERFORMANCE FACTOR, Sp
4.5 STRUCTURAL IRREGULARITY
SECTION 5 DESIGN EARTHQUAKE ACTIONS
5.1 GENERAL
5.2 HORIZONTAL DESIGN ACTION COEFFICIENTS AND DESIGN SPECTRA
5.3 APPLICATION OF DESIGN ACTIONS
5.4 VERTICAL DESIGN ACTIONS
5.5 GROUND MOTION RECORDS FOR TIME HISTORY ANALYSES
5.6 CAPACITY DESIGN
5.7 DIAPHRAGMS
SECTION 6 STRUCTURAL ANALYSIS
6.1 GENERAL
6.2 EQUIVALENT STATIC METHOD
6.3 MODAL RESPONSE SPECTRUM METHOD
6.4 NUMERICAL INTEGRATION TIME HISTORY METHOD
6.5 P-DELTA EFFECTS
6.6 ROCKING STRUCTURES AND STRUCTURAL ELEMENTS
SECTION 7 EARTHQUAKE INDUCED DEFLECTIONS
7.1 GENERAL
7.2 DETERMINATION OF DESIGN HORIZONTAL DEFLECTIONS
7.3 DETERMINATION OF INTER-STOREY DEFLECTION
7.4 HORIZONTAL DEFLECTION LIMITS
7.5 INTER-STOREY DEFLECTION LIMITS
SECTION 8 REQUIREMENTS FOR PARTS AND COMPONENTS
8.1 GENERAL
8.2 DESIGN RESPONSE COEFFICIENT FOR PARTS AND COMPONENTS
8.3 FLOOR HEIGHT COEFFICIENT , CHi
8.4 PART OR COMPONENT SPECTRAL SHAPE COEFFICIENT
8.5 DESIGN ACTIONS ON PARTS AND COMPONENTS
8.6 PART OR COMPONENT RESPONSE FACTOR Cph
8.7 CONNECTIONS
8.8 PARTS SUPPORTED ON LEDGES
APPENDIX A – DEFINITIONS
APPENDIX B – NOTATION
APPENDIX C – DESIGNING FOR ULTIMATE LIMIT STATE
APPENDIX D – REQUIREMENTS FOR MATERIAL DESIGN STANDARDS
Amendments
Previous versions
Related Information
Building Code Compliance Document B1
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: VM1
Citation context:Applicable to NZS 1170.5:2004 (unamended version only), i.e. excluding amendment 1
HSNOCOP 61 Rotationally Moulded Polyethylene Storage Tanks for Non Flammable Hazardous Substances - Revoked
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HSNOCOP 61 Rotationally Moulded Polyethylene Storage Tanks for Non Flammable Hazardous Substances - Revoked
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Section: 2.2
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Section: 5.6
Citation context:The RSMA Compliance standard for traffic signs 2008 provides guidance and specifications for the design of frangible supports including reference to: • specific designs to Australian Standard/New Zealand Standard 1170 Structural Design Actions Set (AS/NZS1170)...
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Citation context:Table 15 contains a general list of applicable relevant standards a number of which have been consulted in the preparation of the BPG. Additional information on particular standards and specific referencing are contained at various points throughout this
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Hazardous Substances (Dangerous Goods And Scheduled Toxic Substances) Transfer Notice 2004
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Section: Schedule 8, Regulation 8(4)(a)(v)
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Section: 1.2.1.1
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Ministry: WorkSafe New Zealand
Section: Appendix C Referenced documents
Citation context:NZS 1170.5 Structural Design Actions – Earthquake Actions
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Citation context:The design of storage and transport frames should meet standards outlined in:... ...AS/NZS 1170 series: New Zealand structural design actions standard series.... ...Storage racks, frames and supports should be designed for the shape, size and weight of the precast concrete element, and to resist the loads and forces applied to them. Design should consider wind zones and ground conditions, and refer to the latest version of the following standards:... ...New Zealand structural design actions standard (AS/NZS 1170)
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Building (Dam Safety) Regulations 2022
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: 20
Citation context:Effective 13/05/2024 - the seismic hazard factor (Z factor) must be calculated in accordance with New Zealand Standard NZS 1170.5:2004 (Structural design actions—Part 5: Earthquake actions—New Zealand), whether or not that standard would otherwise apply.
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NZS 1170.5:2004 STRUCTURAL DESIGN ACTIONS – EARTHQUAKE ACTIONS – NEW ZEALAND
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 DETERMINATION OF EARTHQUAKE ACTIONS
1.3 LIMIT STATES
1.4 SPECIAL STUDIES
1.5 REFERENCED DOCUMENTS
1.6 UNITS
1.7 DEFINITIONS
1.8 NOTATION
SECTION 2 VERIFICATION
2.1 GENERAL REQUIREMENTS
2.2 STRUCTURAL TYPES
2.3 ULTIMATE LIMIT STATE VERIFICATION
2.4 SERVICEABILITY LIMIT STATE VERIFICATION
2.5 DEFORMATION CONTROL
2.6 STRUCTURE PARTS
2.7 DEFORMATION DEMANDS ON STRUCTURAL MEMBERS NOT DESIGNED TO RESIST SEISMIC ACTIONS
SECTION 3 SITE HAZARD SPECTRA
3.1 ELASTIC SITE SPECTRA FOR HORIZONTAL LOADING
3.2 SITE HAZARD SPECTRA FOR VERTICAL LOADING
SECTION 4 STRUCTURAL CHARACTERISTICS
4.1 PERIOD OF VIBRATION
4.2 SEISMIC WEIGHT AND SEISMIC MASS
4.3 STRUCTURAL DUCTILITY FACTOR
4.4 STRUCTURAL PERFORMANCE FACTOR, Sp
4.5 STRUCTURAL IRREGULARITY
SECTION 5 DESIGN EARTHQUAKE ACTIONS
5.1 GENERAL
5.2 HORIZONTAL DESIGN ACTION COEFFICIENTS AND DESIGN SPECTRA
5.3 APPLICATION OF DESIGN ACTIONS
5.4 VERTICAL DESIGN ACTIONS
5.5 GROUND MOTION RECORDS FOR TIME HISTORY ANALYSES
5.6 CAPACITY DESIGN
5.7 DIAPHRAGMS
SECTION 6 STRUCTURAL ANALYSIS
6.1 GENERAL
6.2 EQUIVALENT STATIC METHOD
6.3 MODAL RESPONSE SPECTRUM METHOD
6.4 NUMERICAL INTEGRATION TIME HISTORY METHOD
6.5 P-DELTA EFFECTS
6.6 ROCKING STRUCTURES AND STRUCTURAL ELEMENTS
SECTION 7 EARTHQUAKE INDUCED DEFLECTIONS
7.1 GENERAL
7.2 DETERMINATION OF DESIGN HORIZONTAL DEFLECTIONS
7.3 DETERMINATION OF INTER-STOREY DEFLECTION
7.4 HORIZONTAL DEFLECTION LIMITS
7.5 INTER-STOREY DEFLECTION LIMITS
SECTION 8 REQUIREMENTS FOR PARTS AND COMPONENTS
8.1 GENERAL
8.2 DESIGN RESPONSE COEFFICIENT FOR PARTS AND COMPONENTS
8.3 FLOOR HEIGHT COEFFICIENT , CHi
8.4 PART OR COMPONENT SPECTRAL SHAPE COEFFICIENT
8.5 DESIGN ACTIONS ON PARTS AND COMPONENTS
8.6 PART OR COMPONENT RESPONSE FACTOR Cph
8.7 CONNECTIONS
8.8 PARTS SUPPORTED ON LEDGES
APPENDIX A – DEFINITIONS
APPENDIX B – NOTATION
APPENDIX C – DESIGNING FOR ULTIMATE LIMIT STATE
APPENDIX D – REQUIREMENTS FOR MATERIAL DESIGN STANDARDS
Amendments
Previous versions
NZS 1170.5:2004 (Includes Amdt 1)
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.